DTC U0134-87: Lost Communication with Power Steering Control Module Rear Missing Message; DTC U1171-87: ECB Communication Error (CAN) (CL-Bus) Communication is Lost [09/2023 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
U0134-87	Lost Communication with Power Steering Control Module Rear Missing Message	Communication stops between the No. 2 skid control ECU (brake actuator assembly) and the rear steering link assembly.	CAN main/branch bus lines or connector No. 2 skid control ECU (brake actuator assembly) Rear steering link assembly No. 8 CAN junction connector No. 12 CAN junction connector	DTC Output from No. 2 skid control ECU (brake actuator assembly)
U1171-87	ECB Communication Error (CAN) (CL-Bus) Communication is Lost	Communication stops between the absorber control ECU or rear steering link assembly and the No. 2 skid control ECU (brake actuator assembly).	CAN main/branch bus lines or connector Absorber control ECU Rear steering link assembly No. 2 skid control ECU (brake actuator assembly) No. 8 CAN junction connector No. 12 CAN junction connector	DTC Output from Absorber control ECU Rear steering link assembly